If there is no fund conversion, investors who have already purchased stock funds and want to change funds must redeem their existing stock funds before they can subscribe to another preferred stock fund. This means that investors have to pay a redemption fee first, and then pay the corresponding subscription fee. However, by conducting a fund conversion, the same effect can be achieved by simply paying a conversion fee. Using fund conversion can save investors a significant amount of fees, which is equivalent to earning an additional proportionate amount of profit.